MELVYL IAC DATABASES TELNET STATISTICS
Time period: 07/01/01 through 07/31/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 309 995 1,304
Davis 519 4 523
Irvine 406 0 406
Los Angeles 10 296 306
Riverside 101 100 201
San Diego 61 178 239
San Francisco 163 0 163
Santa Barbara 35 98 133
Santa Cruz 108 88 196
LBL 0 39 39
LLL 0 12 12
Los Alamos n/a 7 7
Other - UC 15 101 116
Stanford 187
Other-Network UC n/a 385 385
_______ ______ _____
1,727 2,303 4,217
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 67 274 3,310
2-4 a.m. 37 183 2,322
4-6 a.m. 20 71 833
6-8 a.m. 77 174 4,555
8-10 a.m. 437 1,056 10,220
10-12 a.m. 786 2,090 93,830
12-2 p.m. 798 2,133 65,334
2-4 p.m. 887 2,398 73,034
4-6 p.m. 594 1,517 39,806
6-8 p.m. 243 645 45,689
8-10 p.m. 142 478 7,235
10-12 p.m. 129 595 4,170
__________ __________ __________ _________________
Total: 4,217 11,614 350,338
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 753 2,447 3,200
Davis 1,321 6 1,327
Irvine 1,236 0 1,236
Los Angeles 28 746 774
Riverside 286 309 595
San Diego 234 448 682
San Francisco 402 0 402
Santa Barbara 88 237 325
Santa Cruz 346 284 630
LBL 0 147 147
LLL 0 17 17
Los Alamos n/a 14 14
Other - UC 33 261 294
Stanford 709
Other-Network UC n/a 1,262 1,262
_______ ______ _____
4,727 6,178 11,614
Number of FIND commands by database
MAGS database 10,198
NEWS database 934
COMP database 482
Total number of FIND commands 11,614
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 9,049 29,115 38,164
Davis 11,002 135 11,137
Irvine 6,937 0 6,937
Los Angeles 685 8,981 9,666
Riverside 2,780 2,446 5,226
San Diego 2,192 192,957 195,149
San Francisco 5,748 0 5,748
Santa Barbara 839 3,488 4,327
Santa Cruz 2,837 3,594 6,431
LBL 0 1,981 1,981
LLL 0 343 343
Los Alamos n/a 324 324
Other - UC 278 32,030 32,308
Stanford 786
Other-Network UC n/a 27,078 27,078
_______ ______ _____
42,347 302,472 345,605
Number of Records Displayed by database:
MAGS database 319,310
NEWS database 5,995
COMP database 25,033
Total number of Records Displayed 345,605
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 85.8%
Percent of NEWS sessions 9.6%
Percent of COMP sessions 4.6%
Percent of searches done in the MAGS database 87.8%
Percent of searches done in the NEWS database 8.0%
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 0.6
Standard deviation in seconds 1.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.8
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:19
Average session length (minutes:seconds) 11:56
Longest session recorded (minutes:seconds) 400:02
Average number of searches completed per session 2.8
Retrievals per search - median 6.0
Retrievals per search - average 673.4
Retrievals per search - standard deviation 10902
Percent of searches completed with 0 results 26.9%
Percent of searches entered that are long 1.3%
Percent of long searches completed
(includes partial results) 61.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 9,361 28.5%
DISPLAY (excluding automatic displays) 12,307 37.5%
HELP 652 2.0%
EXPLAIN 525 1.6%
SET/RESET 1,557 4.7%
SHOW 102 0.3%
ADD ON (AND, OR, AND NOT) 837 2.5%
LOGON or LOGOFF 4,610 14.0%
COMMENT 1 0.0%
SAVE 893 2.7%
USE 8 0.0%
OTHER 1,973 6.0%
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 2,554 25.8% 609 23.8% 10 67.3 267.2
TITLE WORD 2,345 23.7% 740 31.6% 9 378.0 2824.4
EXACT TITLE 254 2.6% 135 53.1% 4 96.9 526.3
JOURNAL 599 6.0% 203 33.9% 840 5501.1 14167.3
EXACT JOURNAL 216 2.2% 107 49.5% 810 5044.8 10840.5
SUBJECT 1,243 12.5% 381 30.6% 27 248.6 1125.5
EXACT SUBJECT 39 0.4% 13 33.3% 47 452.7 857.7
KEYWORD 1,960 19.8% 407 20.8% 24 1494.1 26188.4
SUBFILE 3 0.0% 0 0.0% 137 2564.7 4311.8
PUBLICATION TYPE 20 0.2% 6 30.0% 21 23.1 22.5
DATE 212 2.1% 36 17.0% 12 211.9 613.6
ADDED 5 0.1% 0 0.0% 37,971 35046.8 14049.9
PERIODICAL 131 1.3% 22 16.8% 8 187.1 823.8
EXACT PE 94 0.9% 12 12.8% 3 11.8 24.8
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 232 2.3% 16 6.9% 1,042 2768.0 5349.9
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 596 6.4% 144 24.2% 12 689.4 2128.2
Single 8,697 93.6% 2,390 27.5% 17 989.4 13755.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.3%
SHORT 61.1%
LONG 1.2%
FIELDS 1.1%
PERIODICALS 1.5%
COMMENTS 0.0%
Other 32.8%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 6:54
Average session length (minutes:seconds) 11:19
Longest session recorded (minutes:seconds) 91:09
Average number of searches completed per session 2.5
Retrievals per search - median 9.5
Retrievals per search - average 446.9
Retrievals per search - standard deviation 1435.9
Percent of searches completed with 0 results 27.2%
Percent of searches entered that are long 0.4%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 415 22.9%
DISPLAY (excluding automatic displays) 777 42.9%
HELP 26 1.4%
EXPLAIN 30 1.7%
SET/RESET 84 4.6%
SHOW 2 0.1%
ADD ON (AND, OR, AND NOT) 67 3.7%
LOGON or LOGOFF 281 15.5%
COMMENT 0 0.0%
SAVE 39 2.2%
USE 0 0.0%
OTHER 91 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 27 6.3% 17 63.0% 5 209.1 474.9
TITLE WORD 67 15.5% 29 43.3% 9 228.5 893.1
EXACT TITLE 4 0.9% 4 100% 0 0.0 0.0
JOURNAL 16 3.7% 8 50.0% 2,727 3424.5 2582.5
EXACT JOURNAL 13 3.0% 6 46.2% 1,218 1403.7 1292.6
SUBJECT 54 12.5% 21 38.9% 14 549.6 1336.1
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 230 53.4% 30 13.0% 63 725.9 1904.6
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 3 0.7% 0 0.0% 1,943 2809.3 3327.2
DATE 9 2.1% 2 22.2% 11 98.0 192.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT PE 4 0.9% 1 25.0% 4 3.0 1.7
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 4 0.9% 3 75.0% 695 695.0 0.0
By number of indexes:
Multiple 16 3.9% 4 25.0% 52 1043.0 2000.5
Single 399 96.1% 113 28.3% 36 685.7 1767.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.3%
SHORT 64.7%
LONG 1.4%
FIELDS 1.7%
PERIODICALS 0.4%
COMMENTS 0.0%
Other 27.4%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 2,528
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 183
displays or when any of these paging options is set.
TEXT included with MAIL commands 586
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
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Median session length (minutes:seconds) 2:52
Average session length (minutes:seconds) 8:09
Longest session recorded (minutes:seconds) 93:25
Average number of searches completed per session 2.3
Retrievals per search - median 2.0
Retrievals per search - average 1232.5
Retrievals per search - standard deviation 28249
Percent of searches completed with 0 results 37.3%
Percent of searches entered that are long 0.7%
Percent of long searches completed
(includes partial results) 28.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 897 35.7%
DISPLAY (excluding automatic displays) 596 23.7%
HELP 80 3.2%
EXPLAIN 63 2.5%
SET/RESET 161 6.4%
SHOW 16 0.6%
ADD ON (AND, OR, AND NOT) 37 1.5%
LOGON or LOGOFF 527 21.0%
COMMENT 0 0.0%
SAVE 24 1.0%
USE 1 0.0%
OTHER 108 4.3%
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 96 9.8% 37 38.5% 22 323.3 655.7
TITLE WORD 423 43.4% 157 37.1% 7 153.3 1033.1
EXACT TITLE 22 2.3% 8 36.4% 3 6.2 9.2
JOURNAL 12 1.2% 9 75.0% 42,870 313372 468523
EXACT JOURNAL 4 0.4% 4 100% 0 0.0 0.0
SUBJECT 130 13.3% 59 45.4% 13 169.0 575.2
EXACT SUBJECT 11 1.1% 5 45.5% 15 455.3 1058.5
KEYWORD 201 20.6% 45 22.4% 15 761.5 4465.6
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 60 6.2% 11 18.3% 10 16.2 19.4
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 13 1.3% 6 46.2% 6 21.4 23.8
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 3 0.3% 0 0.0% 42 159.3 207.6
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 88 9.9% 14 15.9% 9 26.8 41.6
Single 799 90.1% 313 39.2% 10 2327.2 38916.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.5%
SHORT 47.4%
LONG 2.5%
FIELDS 0.6%
PERIODICALS 0.6%
COMMENTS 0.0%
Other 45.4%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 10.8%
Ten most frequent errors:
1. First word of command is invalid 32.5%
2. NS command - no next screen 29.7%
3. FIND command with invalid index name 13.9%
4. DISPLAY command contains invalid word 3.5%
5. PS command - no previous screen 3.1%
6. Search term missing from search command 2.5%
7. Valid command at an inappropriate time 1.6%
8. DISPLAY command - no FIND results 1.0%
9. DISPLAY command-record numbers too large 0.9%
10. Add-on search, no index name after verb 0.8%
11. All others 10.5%
Ten most frequent EXPLAIN requests:
1. GUIDE 29.0%
2. LOCATE (ARTICLE DBS) 10.7%
3. INDEXES 9.4%
4. FIND 8.6%
5. COMMANDS 6.8%
6. MAGS DATABASE 5.8%
7. Unrecognized term 4.4%
8. DISPLAYS (IAC DBS) 2.8%
9. DATABASES 2.4%
10. DATES 1.3%
11. All others 18.9%
Ten most frequent HELP situations:
1. Help requested from SET DB command 28.5%
2. First word of command is invalid 18.3%
3. FIND command with invalid index name 12.4%
4. FIND command with zero results 7.1%
5. DISPLAY command - middle of >1 screen 4.5%
6. DISPLAY command-first of >1 screen 3.6%
7. DISPLAY command-complete in one screen 3.5%
8. NS command - no next screen 3.1%
9. FIND command retrieves >1 book 2.1%
10. PS command - no previous screen 1.9%
11. All others 15.1%
Ten most frequent SHOW requests:
1. HISTORY 47.8%
2. SEARCH 26.1%
3. IAC NEWS 7.8%
4. SETTINGS (IAC DBS) 5.2%
5. MAIL STATUS 3.5%
6. GLOSSARY 1.7%
7. SYSTEM NEWS 1.7%
8. MAIL SETTINGS 1.7%
9. UCI NEWS 0.9%
10. LIBRARY NEWS 0.9%
11. All others 2.6%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)