MELVYL IAC DATABASES TELNET STATISTICS
Time period: 12/01/00 through 12/31/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 563 1,281 1,844
Davis 663 34 697
Irvine 529 0 529
Los Angeles 47 399 446
Riverside 227 98 325
San Diego 81 200 281
San Francisco 228 0 228
Santa Barbara 132 230 362
Santa Cruz 166 132 298
LBL 0 17 17
LLL 0 24 24
Los Alamos n/a 3 3
Other - UC 13 183 196
Stanford 165
Other-Network UC n/a 502 502
_______ ______ _____
2,649 3,103 5,917
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 98 280 3,894
2-4 a.m. 72 254 4,570
4-6 a.m. 59 191 4,045
6-8 a.m. 97 280 5,196
8-10 a.m. 442 1,168 13,168
10-12 a.m. 915 2,589 26,526
12-2 p.m. 1,036 3,071 32,667
2-4 p.m. 1,279 3,715 42,614
4-6 p.m. 882 2,608 32,527
6-8 p.m. 413 1,173 16,809
8-10 p.m. 371 1,417 17,938
10-12 p.m. 254 765 9,494
__________ __________ __________ _________________
Total: 5,918 17,511 209,448
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,700 3,703 5,403
Davis 1,780 78 1,858
Irvine 1,584 0 1,584
Los Angeles 164 1,232 1,396
Riverside 574 343 917
San Diego 250 505 755
San Francisco 669 0 669
Santa Barbara 322 683 1,005
Santa Cruz 574 441 1,015
LBL 0 44 44
LLL 0 98 98
Los Alamos n/a 4 4
Other - UC 25 600 625
Stanford 549
Other-Network UC n/a 1,587 1,587
_______ ______ _____
7,642 9,318 17,509
Number of FIND commands by database
MAGS database 15,538
NEWS database 1,240
COMP database 733
Total number of FIND commands 17,509
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 17,214 44,678 61,892
Davis 17,141 1,112 18,253
Irvine 13,037 0 13,037
Los Angeles 2,415 19,039 21,454
Riverside 4,510 4,212 8,722
San Diego 1,646 3,679 5,325
San Francisco 7,042 0 7,042
Santa Barbara 4,141 12,164 16,305
Santa Cruz 4,935 6,049 10,984
LBL 0 238 238
LLL 0 1,623 1,623
Los Alamos n/a 4 4
Other - UC 296 10,947 11,243
Stanford 661
Other-Network UC n/a 29,311 29,311
_______ ______ _____
72,377 133,056 206,094
Number of Records Displayed by database:
MAGS database 191,440
NEWS database 8,313
COMP database 9,695
Total number of Records Displayed 206,094
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.6%
Percent of NEWS sessions 8.1%
Percent of COMP sessions 4.3%
Percent of searches done in the MAGS database 88.7%
Percent of searches done in the NEWS database 7.1%
Percent of searches done in the COMP database 4.2%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.5
Standard deviation in seconds 1.9
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.9
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:56
Average session length (minutes:seconds) 12:16
Longest session recorded (minutes:seconds) 807:11
Average number of searches completed per session 3.0
Retrievals per search - median 5.0
Retrievals per search - average 604.9
Retrievals per search - standard deviation 5696.8
Percent of searches completed with 0 results 29.5%
Percent of searches entered that are long 1.2%
Percent of long searches completed
(includes partial results) 48.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 14,526 28.0%
DISPLAY (excluding automatic displays) 20,710 40.0%
HELP 1,436 2.8%
EXPLAIN 1,057 2.0%
SET/RESET 1,903 3.7%
SHOW 175 0.3%
ADD ON (AND, OR, AND NOT) 1,012 2.0%
LOGON or LOGOFF 6,954 13.4%
COMMENT 0 0.0%
SAVE 983 1.9%
USE 11 0.0%
OTHER 3,059 5.9%
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 3,325 22.1% 911 27.4% 9 64.7 243.5
TITLE WORD 3,259 21.6% 1,002 30.7% 12 334.0 1969.9
EXACT TITLE 379 2.5% 194 51.2% 4 124.9 694.9
JOURNAL 705 4.7% 322 45.7% 1,253 6966.2 14378.9
EXACT JOURNAL 332 2.2% 146 44.0% 895 5999.5 11507.6
SUBJECT 2,999 19.9% 1,052 35.1% 26 297.6 1531.0
EXACT SUBJECT 103 0.7% 51 49.5% 92 496.8 837.2
KEYWORD 3,371 22.4% 703 20.9% 27 1313.3 11450.4
SUBFILE 1 0.0% 0 0.0% 223 223.0 0.0
PUBLICATION TYPE 52 0.3% 17 32.7% 11 65.2 207.3
DATE 129 0.9% 30 23.3% 28 201.7 570.4
ADDED 5 0.0% 0 0.0% 21,794 28609.2 9332.1
PERIODICAL 193 1.3% 23 11.9% 10 341.5 2586.6
EXACT PE 81 0.5% 6 7.4% 4 21.2 55.5
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 132 0.9% 22 16.7% 284 1933.7 3974.0
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 627 4.4% 209 33.3% 9 418.3 1548.7
Single 13,786 95.6% 4,050 29.4% 18 915.3 7127.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.0%
SHORT 63.6%
LONG 2.1%
FIELDS 0.8%
PERIODICALS 1.2%
COMMENTS 0.0%
Other 30.4%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 5:22
Average session length (minutes:seconds) 14:28
Longest session recorded (minutes:seconds) 500:57
Average number of searches completed per session 2.8
Retrievals per search - median 9.0
Retrievals per search - average 840.8
Retrievals per search - standard deviation 5524.3
Percent of searches completed with 0 results 30.4%
Percent of searches entered that are long 2.6%
Percent of long searches completed
(includes partial results) 63.2%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 632 24.6%
DISPLAY (excluding automatic displays) 1,084 42.1%
HELP 30 1.2%
EXPLAIN 38 1.5%
SET/RESET 103 4.0%
SHOW 8 0.3%
ADD ON (AND, OR, AND NOT) 101 3.9%
LOGON or LOGOFF 341 13.3%
COMMENT 0 0.0%
SAVE 81 3.1%
USE 2 0.1%
OTHER 153 5.9%
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 63 9.6% 40 63.5% 9 243.4 412.1
TITLE WORD 190 29.0% 64 33.7% 25 595.2 2570.0
EXACT TITLE 6 0.9% 5 83.3% 102 102.0 0.0
JOURNAL 11 1.7% 7 63.6% 1,437 20297.3 38538.8
EXACT JOURNAL 28 4.3% 6 21.4% 26 5856.2 11166.0
SUBJECT 126 19.2% 48 38.1% 34 571.4 1624.0
EXACT SUBJECT 9 1.4% 1 11.1% 216 1259.5 1668.8
KEYWORD 179 27.3% 29 16.2% 76 1546.6 8805.9
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 3 0.5% 2 66.7% 291 291.0 0.0
DATE 10 1.5% 3 30.0% 26 32.1 24.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 18 2.7% 2 11.1% 33 233.3 285.3
EXACT PE 2 0.3% 0 0.0% 1 1.0 0.0
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 10 1.5% 1 10.0% 1 1.0 0.0
By number of indexes:
Multiple 31 5.0% 10 32.3% 12 18.9 19.6
Single 593 95.0% 188 31.7% 47 1434.2 7328.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 6.1%
SHORT 59.3%
LONG 1.0%
FIELDS 4.7%
PERIODICALS 2.3%
COMMENTS 0.0%
Other 26.6%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 4,377
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 227
displays or when any of these paging options is set.
TEXT included with MAIL commands 1,040
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 5:36
Average session length (minutes:seconds) 9:18
Longest session recorded (minutes:seconds) 70:24
Average number of searches completed per session 2.6
Retrievals per search - median 2.0
Retrievals per search - average 1058.7
Retrievals per search - standard deviation 23936
Percent of searches completed with 0 results 39.6%
Percent of searches entered that are long 2.2%
Percent of long searches completed
(includes partial results) 74.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,150 33.9%
DISPLAY (excluding automatic displays) 887 26.1%
HELP 154 4.5%
EXPLAIN 96 2.8%
SET/RESET 228 6.7%
SHOW 22 0.6%
ADD ON (AND, OR, AND NOT) 90 2.7%
LOGON or LOGOFF 571 16.8%
COMMENT 0 0.0%
SAVE 34 1.0%
USE 1 0.0%
OTHER 160 4.7%
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 104 8.6% 49 47.1% 33 1127.1 2897.0
TITLE WORD 340 28.2% 132 38.8% 7 272.7 1275.3
EXACT TITLE 28 2.3% 16 57.1% 2 2.3 1.7
JOURNAL 7 0.6% 4 57.1% 244 278506 482174
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 381 31.6% 172 45.1% 32 1161.9 5634.6
EXACT SUBJECT 9 0.7% 3 33.3% 59 2310.3 3528.2
KEYWORD 286 23.7% 89 31.1% 20 406.4 1595.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 16 1.3% 5 31.3% 5 66.5 201.9
DATE 19 1.6% 7 36.8% 8 17.7 30.4
ADDED 3 0.2% 3 100% 0 0.0 0.0
PERIODICAL 8 0.7% 5 62.5% 3 2.7 0.6
EXACT PE 0 0.0% 0 0.0% 0 0.0 0.0
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 0.4% 3 60.0% 481 481.0 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 63 5.5% 24 38.1% 4 34.4 113.9
Single 1,078 94.5% 440 40.8% 19 2022.3 33231.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.1%
SHORT 47.2%
LONG 5.1%
FIELDS 1.8%
PERIODICALS 0.2%
COMMENTS 0.0%
Other 40.6%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.7%
Ten most frequent errors:
1. First word of command is invalid 35.1%
2. NS command - no next screen 27.8%
3. FIND command with invalid index name 12.5%
4. PS command - no previous screen 4.3%
5. DISPLAY command contains invalid word 3.6%
6. Valid command at an inappropriate time 2.5%
7. Search term missing from search command 1.8%
8. MAIL command issued w/o email address 1.3%
9. DISPLAY command - no FIND results 1.0%
10. Add-on search, no index name after verb 0.8%
11. All others 9.3%
Ten most frequent EXPLAIN requests:
1. LOCATE (ARTICLE DBS) 24.2%
2. GUIDE 23.8%
3. FIND 9.2%
4. COMMANDS 7.1%
5. MAGS DATABASE 5.7%
6. INDEXES 5.3%
7. Unrecognized term 4.1%
8. ADDON SEARCH 2.8%
9. DISPLAYS (IAC DBS) 2.7%
10. DATABASES 1.4%
11. All others 13.9%
Ten most frequent HELP situations:
1. Help requested from SET DB command 24.6%
2. First word of command is invalid 18.9%
3. FIND command with invalid index name 10.7%
4. DISPLAY command-first of >1 screen 6.2%
5. FIND command with zero results 6.1%
6. DISPLAY command-complete in one screen 4.9%
7. DISPLAY command - middle of >1 screen 4.9%
8. FIND command retrieves >1 book 3.3%
9. NS command - no next screen 2.8%
10. DISPLAY command - last of >1 screen 2.5%
11. All others 15.0%
Ten most frequent SHOW requests:
1. HISTORY 38.2%
2. SEARCH 27.1%
3. MAIL STATUS 12.6%
4. MAIL SETTINGS 5.0%
5. SETTINGS (IAC DBS) 4.5%
6. IAC NEWS 3.0%
7. SYSTEM NEWS 2.5%
8. GLOSSARY 2.0%
9. DISPLAY 2.0%
10. BIBLIOGRAPHIC SOFTWARE 0.5%
11. All others 2.5%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)