MELVYL IAC DATABASES TELNET STATISTICS
Time period: 10/01/99 through 10/31/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,275 3,598 5,873
Davis 1,979 50 2,029
Irvine 3,088 0 3,088
Los Angeles 268 2,120 2,388
Riverside 1,105 191 1,296
San Diego 419 380 799
San Francisco 518 26 544
Santa Barbara 1,212 515 1,727
Santa Cruz 2,701 633 3,334
LBL 0 78 78
LLL 0 32 32
Los Alamos n/a 2 2
Other - UC 43 528 571
Stanford 520
Other-Network UC n/a 1,329 1,329
_______ ______ _____
13,608 9,482 23,610
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 326 1,224 12,440
2-4 a.m. 98 493 6,711
4-6 a.m. 69 282 4,800
6-8 a.m. 242 724 8,134
8-10 a.m. 1,547 4,383 47,867
10-12 a.m. 3,665 11,410 116,830
12-2 p.m. 4,628 14,409 160,061
2-4 p.m. 5,346 16,572 184,376
4-6 p.m. 3,684 11,875 135,920
6-8 p.m. 1,846 6,464 63,843
8-10 p.m. 1,377 4,961 54,938
10-12 p.m. 782 3,015 33,877
__________ __________ __________ _________________
Total: 23,610 75,812 829,797
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 7,217 11,247 18,464
Davis 5,300 207 5,507
Irvine 9,975 0 9,975
Los Angeles 948 6,906 7,854
Riverside 4,262 546 4,808
San Diego 1,093 984 2,077
San Francisco 1,358 53 1,411
Santa Barbara 4,195 1,589 5,784
Santa Cruz 9,561 1,853 11,414
LBL 0 197 197
LLL 0 114 114
Los Alamos n/a 9 9
Other - UC 106 1,821 1,927
Stanford 1,886
Other-Network UC n/a 4,385 4,385
_______ ______ _____
44,015 29,911 75,812
Number of FIND commands by database
MAGS database 67,534
NEWS database 5,833
COMP database 2,445
Total number of FIND commands 75,812
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 80,764 142,540 223,304
Davis 46,409 771 47,180
Irvine 85,845 0 85,845
Los Angeles 12,196 95,991 108,187
Riverside 35,765 6,557 42,322
San Diego 9,711 14,462 24,173
San Francisco 18,322 1,054 19,376
Santa Barbara 38,258 23,075 61,333
Santa Cruz 83,807 21,150 104,957
LBL 0 3,427 3,427
LLL 0 1,725 1,725
Los Alamos n/a 95 95
Other - UC 974 27,815 28,789
Stanford 3,063
Other-Network UC n/a 58,375 58,375
_______ ______ _____
412,051 397,037 812,151
Number of Records Displayed by database:
MAGS database 763,385
NEWS database 40,393
COMP database 26,019
Total number of Records Displayed 812,151
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.8%
Percent of NEWS sessions 9.5%
Percent of COMP sessions 3.7%
Percent of searches done in the MAGS database 89.1%
Percent of searches done in the NEWS database 7.7%
Percent of searches done in the COMP database 3.2%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.8
Standard deviation in seconds 3.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.2
Standard deviation in seconds 3.8
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 7:17
Average session length (minutes:seconds) 12:32
Longest session recorded (minutes:seconds) 425:06
Average number of searches completed per session 3.3
Retrievals per search - median 5.0
Retrievals per search - average 569.3
Retrievals per search - standard deviation 4687.0
Percent of searches completed with 0 results 32.5%
Percent of searches entered that are long 2.0%
Percent of long searches completed
(includes partial results) 48.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 63,413 27.9%
DISPLAY (excluding automatic displays) 90,977 40.1%
HELP 8,496 3.7%
EXPLAIN 5,828 2.6%
SET/RESET 6,123 2.7%
SHOW 1,217 0.5%
ADD ON (AND, OR, AND NOT) 4,121 1.8%
LOGON or LOGOFF 29,838 13.2%
COMMENT 3 0.0%
SAVE 4,192 1.8%
USE 56 0.0%
OTHER 12,616 5.6%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 9,416 14.4% 2,743 29.1% 9 64.7 250.2
TITLE WORD 11,811 18.0% 3,689 31.2% 12 456.4 3203.0
EXACT TITLE 1,621 2.5% 832 51.3% 4 151.3 659.9
JOURNAL 3,190 4.9% 1,767 55.4% 928 6063.6 15514.0
EXACT JOURNAL 1,854 2.8% 890 48.0% 847 4936.8 10415.7
SUBJECT 16,082 24.5% 6,782 42.2% 43 380.8 1851.8
EXACT SUBJECT 760 1.2% 358 47.1% 50 532.8 1260.4
KEYWORD 17,996 27.5% 3,685 20.5% 30 1082.3 7567.3
SUBFILE 54 0.1% 11 20.4% 22 284.0 637.9
PUBLICATION TYPE 256 0.4% 54 21.1% 9 76.7 307.1
DATE 668 1.0% 210 31.4% 11 179.5 984.8
ADDED 13 0.0% 1 7.7% 41,239 26818.1 19928.3
PERIODICAL 946 1.4% 186 19.7% 8 339.2 2191.4
EXACT PE 505 0.8% 89 17.6% 3 69.7 761.8
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 361 0.6% 99 27.4% 120 1836.5 4772.7
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 2,745 4.4% 982 35.8% 8 440.0 3568.9
Single 59,919 95.6% 19,370 32.3% 23 900.8 5926.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.8%
SHORT 65.0%
LONG 1.8%
FIELDS 0.8%
PERIODICALS 1.2%
COMMENTS 0.0%
Other 29.4%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 6:56
Average session length (minutes:seconds) 11:43
Longest session recorded (minutes:seconds) 476:29
Average number of searches completed per session 2.7
Retrievals per search - median 7.0
Retrievals per search - average 1921.9
Retrievals per search - standard deviation 20486
Percent of searches completed with 0 results 32.9%
Percent of searches entered that are long 2.1%
Percent of long searches completed
(includes partial results) 55.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,180 25.5%
DISPLAY (excluding automatic displays) 3,347 39.1%
HELP 352 4.1%
EXPLAIN 237 2.8%
SET/RESET 292 3.4%
SHOW 53 0.6%
ADD ON (AND, OR, AND NOT) 265 3.1%
LOGON or LOGOFF 1,237 14.5%
COMMENT 1 0.0%
SAVE 124 1.4%
USE 1 0.0%
OTHER 465 5.4%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 229 10.2% 125 54.6% 8 48.9 155.2
TITLE WORD 448 20.0% 161 35.9% 29 851.3 4549.6
EXACT TITLE 38 1.7% 28 73.7% 50 53.0 51.8
JOURNAL 95 4.2% 61 64.2% 2,536 12368.9 26967.7
EXACT JOURNAL 25 1.1% 11 44.0% 3,157 4364.8 6292.3
SUBJECT 418 18.7% 171 40.9% 67 820.5 2766.4
EXACT SUBJECT 14 0.6% 8 57.1% 78 149.8 205.6
KEYWORD 902 40.3% 167 18.5% 90 4935.7 36287.5
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 6 0.3% 1 16.7% 255 1015.6 1578.9
DATE 34 1.5% 13 38.2% 42 201.9 658.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 20 0.9% 2 10.0% 2 10.8 13.8
EXACT PE 3 0.1% 1 33.3% 105 105.0 147.1
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 4 0.2% 1 25.0% 499 1211.0 1466.0
By number of indexes:
Multiple 77 3.6% 35 45.5% 44 352.8 846.4
Single 2,078 96.4% 678 32.6% 61 3246.9 26839.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.9%
SHORT 62.8%
LONG 1.5%
FIELDS 1.8%
PERIODICALS 0.7%
COMMENTS 0.0%
Other 28.3%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 15,084
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 795
displays or when any of these paging options is set.
TEXT included with MAIL commands 2,939
SET DISPLAY TEXT commands 2
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:41
Average session length (minutes:seconds) 9:53
Longest session recorded (minutes:seconds) 479:21
Average number of searches completed per session 2.6
Retrievals per search - median 2.0
Retrievals per search - average 1489.9
Retrievals per search - standard deviation 30612
Percent of searches completed with 0 results 39.5%
Percent of searches entered that are long 1.7%
Percent of long searches completed
(includes partial results) 47.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 5,473 34.2%
DISPLAY (excluding automatic displays) 3,755 23.4%
HELP 827 5.2%
EXPLAIN 568 3.5%
SET/RESET 896 5.6%
SHOW 111 0.7%
ADD ON (AND, OR, AND NOT) 360 2.2%
LOGON or LOGOFF 2,902 18.1%
COMMENT 0 0.0%
SAVE 318 2.0%
USE 4 0.0%
OTHER 802 5.0%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 311 5.5% 170 54.7% 19 370.0 617.9
TITLE WORD 1,252 22.2% 471 37.6% 12 388.3 2295.0
EXACT TITLE 104 1.8% 62 59.6% 2 63.9 250.9
JOURNAL 55 1.0% 34 61.8% 355 299779 415833
EXACT JOURNAL 44 0.8% 30 68.2% 74 485.9 1045.5
SUBJECT 1,731 30.8% 753 43.5% 46 776.5 2696.9
EXACT SUBJECT 76 1.4% 46 60.5% 66 1131.7 1959.5
KEYWORD 1,864 33.1% 578 31.0% 21 846.1 6284.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 20 0.4% 7 35.0% 11 21.2 30.7
DATE 83 1.5% 26 31.3% 30 138.9 347.6
ADDED 6 0.1% 0 0.0% 1,361 2257.5 3159.1
PERIODICAL 41 0.7% 11 26.8% 44 116.4 166.8
EXACT PE 37 0.7% 16 43.2% 10 87.2 265.5
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 5 0.1% 3 60.0% 146 146.0 0.0
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 219 4.1% 75 34.2% 18 189.1 566.5
Single 5,186 95.9% 2,056 39.6% 24 2720.3 41489.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.4%
SHORT 50.0%
LONG 2.5%
FIELDS 0.8%
PERIODICALS 1.0%
COMMENTS 0.0%
Other 42.3%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 14.3%
Ten most frequent errors:
1. First word of command is invalid 38.3%
2. NS command - no next screen 23.2%
3. FIND command with invalid index name 11.8%
4. PS command - no previous screen 4.7%
5. DISPLAY command contains invalid word 3.8%
6. Valid command at an inappropriate time 2.4%
7. Search term missing from search command 2.2%
8. DISPLAY command - no FIND results 1.0%
9. MAIL command issued w/o email address 0.9%
10. Add-on search, no index name after verb 0.8%
11. All others 10.9%
Ten most frequent EXPLAIN requests:
1. GUIDE 23.9%
2. LOCATE (ARTICLE DBS) 18.8%
3. FIND 8.6%
4. COMMANDS 7.4%
5. INDEXES 7.1%
6. Unrecognized term 5.3%
7. MAGS DATABASE 4.2%
8. ADDON SEARCH 3.1%
9. DISPLAYS (IAC DBS) 3.0%
10. MAIL 2.3%
11. All others 16.2%
Ten most frequent HELP situations:
1. Help requested from SET DB command 22.1%
2. First word of command is invalid 20.5%
3. FIND command with invalid index name 10.3%
4. FIND command with zero results 7.3%
5. DISPLAY command - middle of >1 screen 5.1%
6. DISPLAY command-first of >1 screen 4.7%
7. DISPLAY command-complete in one screen 4.6%
8. FIND command retrieves >1 book 3.4%
9. NS command - no next screen 2.8%
10. PS command - no previous screen 2.1%
11. All others 17.1%
Ten most frequent SHOW requests:
1. SEARCH 36.4%
2. HISTORY 30.6%
3. MAIL STATUS 7.4%
4. IAC NEWS 4.1%
5. MAIL SETTINGS 4.0%
6. GLOSSARY 3.7%
7. SETTINGS (IAC DBS) 3.1%
8. SYSTEM NEWS 2.1%
9. DISPLAY 1.8%
10. DOWNLOADING 0.9%
11. All others 5.8%