MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 04/27/02 through 05/03/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 47 493 540
Davis 193 17 210
Irvine 160 0 160
Los Angeles 3 170 173
Riverside 13 42 55
San Diego 25 162 187
San Francisco 126 0 126
Santa Barbara 4 64 68
Santa Cruz 8 45 53
LBL 0 84 84
LLL 0 42 42
Los Alamos n/a 0 0
Other - UC 1 59 60
U.S. Forestry 0
Other-Network UC n/a 229 229
_______ ______ _____
580 1,407 1,987
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 31 97 575
2-4 a.m. 22 89 1,433
4-6 a.m. 22 57 555
6-8 a.m. 62 161 854
8-10 a.m. 217 638 5,171
10-12 a.m. 385 1,498 10,134
12-2 p.m. 334 1,002 8,367
2-4 p.m. 381 1,053 9,660
4-6 p.m. 286 779 6,936
6-8 p.m. 115 374 2,680
8-10 p.m. 85 331 3,640
10-12 p.m. 47 194 1,149
__________ __________ __________ _________________
Total: 1,987 6,273 51,154
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 102 1,513 1,615
Davis 559 57 616
Irvine 598 0 598
Los Angeles 20 637 657
Riverside 29 136 165
San Diego 45 504 549
San Francisco 684 0 684
Santa Barbara 7 179 186
Santa Cruz 13 96 109
LBL 0 201 201
LLL 0 131 131
Los Alamos n/a 0 0
Other - UC 2 171 173
U.S. Forestry 0
Other-Network UC n/a 589 589
_______ ______ _____
2,059 4,214 6,273
Number of FIND commands by database
CC database 6,135
CCT database 138
Total number of FIND commands 6,273
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 741 12,472 13,213
Davis 4,614 294 4,908
Irvine 3,104 0 3,104
Los Angeles 126 5,052 5,178
Riverside 105 1,746 1,851
San Diego 347 3,824 4,171
San Francisco 6,137 0 6,137
Santa Barbara 150 2,287 2,437
Santa Cruz 101 963 1,064
LBL 0 2,048 2,048
LLL 0 1,209 1,209
Los Alamos n/a 0 0
Other - UC 3 1,395 1,398
U.S. Forestry 0
Other-Network UC n/a 4,436 4,436
_______ ______ _____
15,428 35,726 51,154
Number of Records Displayed by database:
CC database 47,489
CCT database 3,665
Total number of Records Displayed 51,154
1.4 Relative Use of Databases
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Relative use of CC vs. CCT databases:
Percent of CC sessions 95.3%
Percent of CCT sessions 4.7%
Percent of searches done in the CC database 97.8%
Percent of searches done in the CCT database 2.2%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.9
Standard deviation in seconds 4.1
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.1
2.0 CC Database Statistics
___________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 286:25
Average number of searches completed per session 3.2
Retrievals per search - median 9.0
Retrievals per search - average 604.0
Retrievals per search - standard deviation 4805.8
Percent of searches completed with 0 results 21.4%
Percent of searches entered that are long 0.5%
Percent of long searches completed
(includes partial results) 44.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 5,523 36.7%
DISPLAY (excluding automatic displays) 4,460 29.6%
HELP 149 1.0%
EXPLAIN 142 0.9%
SET/RESET 734 4.9%
SHOW 57 0.4%
ADD ON (AND, OR, AND NOT) 612 4.1%
LOGON or LOGOFF 2,440 16.2%
COMMENT 0 0.0%
SAVE 249 1.7%
USE 1 0.0%
OTHER 688 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 2,540 42.4% 375 14.8% 30 221.0 1223.9
TITLE WORD 1,745 29.1% 538 30.8% 11 779.0 4340.6
EXACT TITLE 152 2.5% 61 40.1% 2 15.4 48.6
JOURNAL 332 5.5% 76 22.9% 1,655 5110.9 15950.1
EXACT JOURNAL 160 2.7% 65 40.6% 1,586 3507.1 6841.6
SUBJECT CAT 11 0.2% 2 18.2% 76 426.3 1002.5
SUBFILE 12 0.2% 0 0.0% 26 240.0 580.2
PUBLICATION TYPE 16 0.3% 6 37.5% 4 19.0 30.2
LANGUAGE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 87 1.5% 21 24.1% 26 84.2 178.0
ADDED 68 1.1% 21 30.9% 3 11.2 16.2
PERIODICAL 491 8.2% 60 12.2% 5 23.4 77.9
EXACT PE 135 2.3% 6 4.4% 2 12.0 36.3
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 241 4.0% 77 31.9% 32 2294.7 14210.7
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 477 8.7% 160 33.5% 5 47.8 226.1
Single 5,024 91.3% 983 19.6% 25 849.3 5776.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.0%
SHORT 70.8%
LONG 4.9%
FIELDS 1.9%
PERIODICALS 17.4%
COMMENTS 0.0%
Other 1.1%
2.1 CCT Database Statistics
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Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 22:58
Average number of searches completed per session 1.5
Retrievals per search - median 37.5
Retrievals per search - average 315.2
Retrievals per search - standard deviation 1338.6
Percent of searches completed with 0 results 26.1%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 138 24.8%
DISPLAY (excluding automatic displays) 156 28.0%
HELP 44 7.9%
EXPLAIN 31 5.6%
SET/RESET 58 10.4%
SHOW 10 1.8%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 98 17.6%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 22 3.9%
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:
JOURNAL 70 50.7% 32 45.7% 175 495.5 811.7
EXACT JOURNAL 43 31.2% 2 4.7% 155 238.6 320.1
SUBJECT CAT 1 0.7% 0 0.0% 14,800 14800.0 0.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 0 0.0% 0 0.0% 0 0.0 0.0
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 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 24 17.4% 2 8.3% 2 4.0 4.7
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 138 100% 36 26.1% 106 426.5 1543.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.9%
ISSUES 49.7%
SHORT 8.2%
LONG 24.6%
PERIODICALS 14.6%
COMMENTS 0.0%
Other 0.0%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 7.3%
Ten most frequent errors:
1. NS command - no next screen 29.3%
2. First word of command is invalid 28.1%
3. FIND command with invalid index name 11.9%
4. Index invalid in current database 5.0%
5. DISPLAY command - no FIND results 3.5%
6. DISPLAY command contains invalid word 2.4%
7. PS command - no previous screen 2.0%
8. Valid command at an inappropriate time 1.8%
9. Search term missing from search command 1.8%
10. Add-on search, no index name after verb 1.4%
11. All others 12.8%
Ten most frequent EXPLAIN requests:
1. FIND (CC DB) 16.8%
2. LOCATE (ARTICLE DBS) 12.7%
3. CC GUIDE 10.4%
4. CC INDEXES 10.4%
5. COMMANDS 8.7%
6. FIND (CCT DB) 6.4%
7. Unrecognized term 5.8%
8. CC DATABASE 2.9%
9. CCT INDEXES 2.9%
10. CCT DATABASE 2.9%
11. All others 20.2%
Ten most frequent HELP situations:
1. First word of command is invalid 17.5%
2. Help requested from START CC command 12.8%
3. F/BR with index invalid in current DB 10.7%
4. Help requested from SET DB command 9.3%
5. FIND command with invalid index name 6.8%
6. DISPLAY command-first of >1 screen 6.6%
7. FIND command with zero results 5.2%
8. FIND command retrieves >1 book 5.2%
9. DISPLAY command - middle of >1 screen 4.9%
10. DISPLAY command-complete in one screen 2.5%
11. All others 18.6%
Ten most frequent SHOW requests:
1. MAIL STATUS 50.7%
2. HISTORY 14.9%
3. SYSTEM NEWS 9.0%
4. CC NEWS 7.5%
5. SEARCH 4.5%
6. SYSTEM4 NEWS 3.0%
7. CC SETTINGS 3.0%
8. UPDATE 3.0%
9. GLOSSARY 1.5%
10. SYSTEM1 NEWS 1.5%
11. All others 1.5%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)