MELVYL IAC DATABASES TELNET STATISTICS
Time period: 01/01/00 through 01/31/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 841 1,948 2,789
Davis 1,393 93 1,486
Irvine 2,146 0 2,146
Los Angeles 164 1,075 1,239
Riverside 645 157 802
San Diego 321 267 588
San Francisco 410 0 410
Santa Barbara 640 524 1,164
Santa Cruz 1,300 534 1,834
LBL 0 98 98
LLL 0 28 28
Los Alamos n/a 3 3
Other - UC 85 161 246
Stanford 355
Other-Network UC n/a 1,002 1,002
_______ ______ _____
7,945 5,890 14,190
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 154 596 10,388
2-4 a.m. 80 285 3,811
4-6 a.m. 56 177 3,285
6-8 a.m. 138 381 4,072
8-10 a.m. 1,126 3,059 29,861
10-12 a.m. 2,322 6,467 65,374
12-2 p.m. 2,692 8,092 78,374
2-4 p.m. 3,048 9,168 98,584
4-6 p.m. 2,173 6,434 76,684
6-8 p.m. 997 3,445 38,853
8-10 p.m. 873 3,042 32,464
10-12 p.m. 531 2,251 29,217
__________ __________ __________ _________________
Total: 14,190 43,397 470,967
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,341 5,373 7,714
Davis 4,045 192 4,237
Irvine 7,195 0 7,195
Los Angeles 506 3,015 3,521
Riverside 2,328 505 2,833
San Diego 842 757 1,599
San Francisco 1,105 0 1,105
Santa Barbara 2,043 1,403 3,446
Santa Cruz 4,661 1,686 6,347
LBL 0 233 233
LLL 0 50 50
Los Alamos n/a 14 14
Other - UC 162 542 704
Stanford 1,232
Other-Network UC n/a 3,167 3,167
_______ ______ _____
25,228 16,937 43,397
Number of FIND commands by database
MAGS database 38,897
NEWS database 3,022
COMP database 1,478
Total number of FIND commands 43,397
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 24,381 69,401 93,782
Davis 38,299 981 39,280
Irvine 64,039 0 64,039
Los Angeles 5,193 35,967 41,160
Riverside 18,896 4,238 23,134
San Diego 6,751 9,969 16,720
San Francisco 15,014 0 15,014
Santa Barbara 21,348 18,953 40,301
Santa Cruz 42,747 17,764 60,511
LBL 0 4,227 4,227
LLL 0 374 374
Los Alamos n/a 20 20
Other - UC 3,976 6,319 10,295
Stanford 2,046
Other-Network UC n/a 42,303 42,303
_______ ______ _____
240,644 210,516 453,206
Number of Records Displayed by database:
MAGS database 437,762
NEWS database 19,809
COMP database 13,396
Total number of Records Displayed 453,206
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.2%
Percent of NEWS sessions 8.9%
Percent of COMP sessions 3.8%
Percent of searches done in the MAGS database 89.6%
Percent of searches done in the NEWS database 7.0%
Percent of searches done in the COMP database 3.4%
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 4.5
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.2
Standard deviation in seconds 4.5
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 7:03
Average session length (minutes:seconds) 12:52
Longest session recorded (minutes:seconds) 722:46
Average number of searches completed per session 3.1
Retrievals per search - median 5.0
Retrievals per search - average 532.7
Retrievals per search - standard deviation 6003.1
Percent of searches completed with 0 results 30.4%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 53.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 36,066 27.2%
DISPLAY (excluding automatic displays) 54,395 41.0%
HELP 3,875 2.9%
EXPLAIN 2,684 2.0%
SET/RESET 4,394 3.3%
SHOW 573 0.4%
ADD ON (AND, OR, AND NOT) 2,831 2.1%
LOGON or LOGOFF 16,938 12.8%
COMMENT 4 0.0%
SAVE 3,051 2.3%
USE 31 0.0%
OTHER 7,734 5.8%
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 7,292 19.5% 2,063 28.3% 9 63.5 254.0
TITLE WORD 6,816 18.2% 2,161 31.7% 11 339.5 1973.8
EXACT TITLE 935 2.5% 466 49.8% 3 93.4 481.9
JOURNAL 2,054 5.5% 925 45.0% 964 5618.1 14177.2
EXACT JOURNAL 968 2.6% 433 44.7% 739 4749.3 9869.4
SUBJECT 7,376 19.7% 2,934 39.8% 38 328.9 1437.7
EXACT SUBJECT 439 1.2% 186 42.4% 71 937.5 5451.6
KEYWORD 9,370 25.0% 1,887 20.1% 29 918.3 11581.1
SUBFILE 50 0.1% 9 18.0% 29 396.5 1116.7
PUBLICATION TYPE 77 0.2% 16 20.8% 16 522.7 3339.2
DATE 414 1.1% 104 25.1% 31 338.8 1702.7
ADDED 6 0.0% 1 16.7% 16,986 13360.6 7870.5
PERIODICAL 791 2.1% 154 19.5% 7 315.8 2275.0
EXACT PE 417 1.1% 71 17.0% 3 31.6 148.7
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 427 1.1% 97 22.7% 461 2674.7 6122.4
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 1,624 4.5% 531 32.7% 12 708.1 3268.3
Single 34,125 95.5% 10,420 30.5% 21 807.8 7555.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.6%
SHORT 63.3%
LONG 2.2%
FIELDS 1.2%
PERIODICALS 1.7%
COMMENTS 0.0%
Other 28.9%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 5:45
Average session length (minutes:seconds) 10:26
Longest session recorded (minutes:seconds) 125:12
Average number of searches completed per session 2.7
Retrievals per search - median 6.0
Retrievals per search - average 908.0
Retrievals per search - standard deviation 6830.6
Percent of searches completed with 0 results 32.0%
Percent of searches entered that are long 0.9%
Percent of long searches completed
(includes partial results) 69.2%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,297 26.1%
DISPLAY (excluding automatic displays) 1,902 38.3%
HELP 139 2.8%
EXPLAIN 119 2.4%
SET/RESET 201 4.0%
SHOW 19 0.4%
ADD ON (AND, OR, AND NOT) 181 3.6%
LOGON or LOGOFF 757 15.2%
COMMENT 1 0.0%
SAVE 90 1.8%
USE 1 0.0%
OTHER 264 5.3%
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 168 12.2% 113 67.3% 2 128.1 349.6
TITLE WORD 296 21.5% 106 35.8% 30 380.6 1247.1
EXACT TITLE 13 0.9% 7 53.8% 457 998.5 1722.8
JOURNAL 46 3.3% 31 67.4% 4,572 15112.6 32835.2
EXACT JOURNAL 16 1.2% 4 25.0% 2,837 11138.8 21301.6
SUBJECT 172 12.5% 49 28.5% 60 1144.8 6229.2
EXACT SUBJECT 11 0.8% 3 27.3% 27 73.8 104.2
KEYWORD 569 41.4% 115 20.2% 65 1439.6 8704.9
SUBFILE 1 0.1% 1 100% 0 0.0 0.0
PUBLICATION TYPE 5 0.4% 3 60.0% 67 66.5 82.7
DATE 53 3.9% 11 20.8% 21 125.8 512.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 11 0.8% 4 36.4% 3 145.0 369.2
EXACT PE 7 0.5% 0 0.0% 2 2.1 1.2
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 8 0.6% 0 0.0% 39 55.8 56.3
By number of indexes:
Multiple 79 6.1% 21 26.6% 19 101.4 438.0
Single 1,213 93.9% 403 33.2% 48 1525.6 8867.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.6%
SHORT 60.9%
LONG 1.0%
FIELDS 2.2%
PERIODICALS 0.5%
COMMENTS 0.0%
Other 29.9%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 9,158
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 538
displays or when any of these paging options is set.
TEXT included with MAIL commands 1,963
SET DISPLAY TEXT commands 1
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:16
Average session length (minutes:seconds) 8:11
Longest session recorded (minutes:seconds) 126:02
Average number of searches completed per session 2.4
Retrievals per search - median 2.0
Retrievals per search - average 3386.3
Retrievals per search - standard deviation 51123
Percent of searches completed with 0 results 38.6%
Percent of searches entered that are long 1.3%
Percent of long searches completed
(includes partial results) 44.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,848 34.7%
DISPLAY (excluding automatic displays) 1,900 23.1%
HELP 338 4.1%
EXPLAIN 284 3.5%
SET/RESET 509 6.2%
SHOW 50 0.6%
ADD ON (AND, OR, AND NOT) 174 2.1%
LOGON or LOGOFF 1,614 19.7%
COMMENT 0 0.0%
SAVE 117 1.4%
USE 3 0.0%
OTHER 374 4.6%
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 239 7.8% 116 48.5% 18 264.3 664.1
TITLE WORD 750 24.5% 266 35.5% 13 228.2 1027.5
EXACT TITLE 37 1.2% 25 67.6% 13 66.2 111.1
JOURNAL 80 2.6% 45 56.3% 3,206 264969 397647
EXACT JOURNAL 25 0.8% 8 32.0% 41 751.7 2436.6
SUBJECT 728 23.8% 318 43.7% 32 616.2 2100.0
EXACT SUBJECT 28 0.9% 15 53.6% 26 149.6 257.0
KEYWORD 1,021 33.4% 345 33.8% 17 588.4 2858.4
SUBFILE 2 0.1% 2 100% 0 0.0 0.0
PUBLICATION TYPE 5 0.2% 1 20.0% 3 3.8 3.4
DATE 127 4.2% 60 47.2% 10 651.9 4947.1
ADDED 2 0.1% 2 100% 0 0.0 0.0
PERIODICAL 10 0.3% 3 30.0% 42 77.4 119.4
EXACT PE 5 0.2% 0 0.0% 16 22.4 20.0
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 1 0.0% 1 100% 0 0.0 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 223 7.9% 105 47.1% 9 516.4 3843.6
Single 2,595 92.1% 988 38.1% 20 6225.8 69591.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.0%
SHORT 47.5%
LONG 3.6%
FIELDS 1.2%
PERIODICALS 0.6%
COMMENTS 0.0%
Other 43.0%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.0%
Ten most frequent errors:
1. First word of command is invalid 35.2%
2. NS command - no next screen 26.2%
3. FIND command with invalid index name 11.6%
4. PS command - no previous screen 4.1%
5. DISPLAY command contains invalid word 3.8%
6. Valid command at an inappropriate time 2.3%
7. Search term missing from search command 2.1%
8. DISPLAY command - no FIND results 1.2%
9. DISPLAY command-record numbers too large 1.2%
10. MAIL command issued w/o email address 0.9%
11. All others 11.4%
Ten most frequent EXPLAIN requests:
1. GUIDE 25.0%
2. LOCATE (ARTICLE DBS) 14.1%
3. FIND 8.8%
4. COMMANDS 7.8%
5. INDEXES 6.8%
6. MAGS DATABASE 4.7%
7. Unrecognized term 4.3%
8. DISPLAYS (IAC DBS) 3.2%
9. ADDON SEARCH 2.7%
10. DATABASES 1.9%
11. All others 20.7%
Ten most frequent HELP situations:
1. Help requested from SET DB command 24.4%
2. First word of command is invalid 20.6%
3. FIND command with invalid index name 10.4%
4. FIND command with zero results 7.3%
5. DISPLAY command-first of >1 screen 4.9%
6. DISPLAY command - middle of >1 screen 4.8%
7. DISPLAY command-complete in one screen 3.3%
8. FIND command retrieves >1 book 3.2%
9. NS command - no next screen 2.9%
10. DISPLAY command - last of >1 screen 1.7%
11. All others 16.5%
Ten most frequent SHOW requests:
1. SEARCH 37.2%
2. HISTORY 32.1%
3. IAC NEWS 6.6%
4. MAIL STATUS 6.4%
5. GLOSSARY 4.3%
6. SYSTEM NEWS 3.4%
7. SETTINGS (IAC DBS) 2.8%
8. MAIL SETTINGS 2.6%
9. LIBRARY NEWS 0.7%
10. DATABASE NEWS 0.5%
11. All others 3.4%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)